descr.c revision 1.3 
1/*	$NetBSD: descr.c,v 1.3 2003/03/08 07:45:58 lukem Exp $	*/
2
3/*
4 * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__RCSID("$NetBSD: descr.c,v 1.3 2003/03/08 07:45:58 lukem Exp $");
31
32#include <sys/types.h>
33
34#include <assert.h>
35#include <errno.h>
36#include <stdlib.h>
37#include <string.h>
38#include <unistd.h>
39#include <sys/time.h>
40
41#include <dev/usb/usb.h>
42
43#include "usbhid.h"
44#include "usbvar.h"
45
46report_desc_t
47hid_get_report_desc(int fd)
48{
49	struct usb_ctl_report_desc rep;
50
51	_DIAGASSERT(fd != -1);
52
53	rep.ucrd_size = 0;
54	if (ioctl(fd, USB_GET_REPORT_DESC, &rep) < 0)
55		return (NULL);
56
57	return hid_use_report_desc(rep.ucrd_data, (unsigned int)rep.ucrd_size);
58}
59
60report_desc_t
61hid_use_report_desc(unsigned char *data, unsigned int size)
62{
63	report_desc_t r;
64
65	r = malloc(sizeof(*r) + size);
66	if (r == 0) {
67		errno = ENOMEM;
68		return (NULL);
69	}
70	r->size = size;
71	memcpy(r->data, data, size);
72	return (r);
73}
74
75void
76hid_dispose_report_desc(report_desc_t r)
77{
78
79	free(r);
80}
81